.box2{
    width: 100%;
    margin: auto;
    text-align: center;
}
h1{
    font-size: 37px;
    font-family: "黑体";
    color: #232323;
    text-align: center;
}
h2{
    color: #555555;
    text-align: center;
    font-size: 16px;
}